Caulking Gun Plunger Spring Latch Quick Release
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Solution Overview
Problem
Conventional caulking guns require time-consuming attachment and detachment of plungers using bolts or screws, limiting their compatibility with different dispensing cartridges of varying sizes.
Innovation Solution
A caulking gun design featuring a plunger with a head and pusher system that allows easy and quick attachment to the piston rod via a spring latch and inner peripheral channel, eliminating the need for fasteners and tools, enabling compatibility with various cartridge sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the plunger is attached to the piston rod with bolts or screws, then the attachment is secure, but it takes time to thread and unthread the screws
Solution Approach 1:
The plunger is divided into separate components: a head portion and a pusher portion. The head attaches to the piston rod while the pusher can be quickly detached and replaced. This segmentation allows the secure head attachment to remain while enabling rapid pusher changes without time-consuming fastener operations.
Solution Approach 2:
The pusher is designed with dynamic attachment and detachment capability through the spring-loaded plunger tip mechanism. The plunger tip can be depressed to release the pusher, allowing quick changes without tools, while maintaining secure attachment during use through the spring latch mechanism.
2Reliability
If the plunger is solidly attached with welders or adhesive materials, then the attachment is permanent and secure, but the plunger can only engage with a specific dispensing cartridge of a predetermined size
Solution Approach 1:
The plunger is segmented into a head and pusher components that can be separated. The head remains attached to the piston rod while the pusher can be exchanged to match different cartridge sizes and types, providing versatility while maintaining secure attachment through the head portion.
Solution Approach 2:
The plunger head is designed with universal compatibility to work with multiple cartridge types and sizes. By keeping the head attached and only replacing the pusher, a single plunger assembly can serve multiple functions across different dispensing cartridge configurations.
3Reliability
If the plunger is solidly attached with welders or adhesive materials, then the attachment is permanent, but fasteners and tools are required for attachment and detachment
Solution Approach 1:
The pusher incorporates a dynamic release mechanism where depressing the plunger tip releases the spring latch, allowing the pusher to be easily removed without tools. During normal operation, the spring maintains secure attachment, providing both reliability and ease of operation.
Solution Approach 2:
The spring-loaded plunger tip mechanism allows the operator to self-release the pusher by simply depressing the tip, eliminating the need for external tools or fasteners. The system serves itself through the spring mechanism that automatically secures and releases the pusher.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates rapid and secure attachment of plungers to piston rods, allowing the caulking gun to engage with different dispensing cartridges without the need for tools, enhancing versatility and efficiency.
Implementation Method 1
The pusher includes a spring latch provided on the upper portion of the pusher for engaging with the head and for locking the head to the pusher
Data Source
AI summary
A caulking gun includes a stock having a handle, a piston rod slidably attached to the stock and movable forwardly and rearwardly relative to the stock, the piston rod includes a front portion, and a plunger attached to the front portion, the plunger including a head attached to the front portion, and the plunger including a pusher having an opening formed in an upper portion of the pusher for receiving and engaging with the head and for securing the head to the pusher. The pusher includes an inner peripheral channel formed in the upper portion and communicating with the opening of the pusher for receiving and engaging with the head. The pusher includes a spring latch on the upper portion for engaging with the head and for locking the head to the pusher and for preventing the pusher from being disengaged from the head.